润滑剂量化滑动状态的摩擦学
Tribology of the lubricant quantized-sliding state
摘要：
在朗之万动力学的框架中，我们证明了以前在一个简单的1D边界润滑模型中发现的奇特的量子化滑动状态的明确证据[物理学评论Lett. 97，056101（2006）]，用于剪切下的受限多层固体润滑剂的基本上不太理想化的2D描述。这种动态状态，标志着由一个非平凡的"量化“的平均润滑剂中心的质量速度比外部施加的滑动速度，恢复，并示出对热波动的影响，淬火无序的限制基板，并在很宽的范围内的加载力是强大的。润滑剂的柔软性，设置传播的孤子结构的宽度，被发现在促进登记相称的区域中发挥了重要作用，有利于这种量化的滑动。通过评估瞬时施加在顶板上的力，我们发现这种量子化的滑动代表了一种动态的“钉扎”状态，其特征在于动摩擦值显着较低。虽然量子化的滑动发生由于孤子被轻轻地驱动，过渡到普通的unpinned滑动制度可以涉及润滑剂熔化由于大的剪切引起的焦耳加热，例如在大的速度。
英文摘要：
In the framework of Langevin dynamics, we demonstrate clear evidence of the peculiar quantized sliding state, previously found in a simple 1D boundary lubricated model [Phys. Rev. Lett. 97, 056101 (2006)], for a substantially less idealized 2D description of a confined multi-layer solid lubricant under shear. This dynamical state, marked by a nontrivial ``quantized'' ratio of the averaged lubricant center-of-mass velocity to the externally imposed sliding speed, is recovered, and shown to be robust against the effects of thermal fluctuations, quenched disorder in the confining substrates, and over a wide range of loading forces. The lubricant softness, setting the width of the propagating solitonic structures, is found to play a major role in promoting in-registry commensurate regions beneficial to this quantized sliding. By evaluating the force instantaneously exerted on the top plate, we find that this quantized sliding represents a dynamical ``pinned'' state, characterized by significantly low values of the kinetic friction. While the quantized sliding occurs due to solitons being driven gently, the transition to ordinary unpinned sliding regimes can involve lubricant melting due to large shear-induced Joule heating, for example at large speed.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
